Show an astrometry debug image.
Parameters
----------
refCat : `lsst.afw.table.SimpleCatalog`
reference object catalog; must have fields "centroid_x" an
"centroid_y"
sourceCat : `lsst.afw.table.SourceCatalg`
source catalog; must have field "slot_Centroid_x" and "slot_Centroid_y"
distortedCentroidKey : `lsst.afw.table.Key`
key for sourceCat with field to use for distorted positions
exposure : `lsst.afw.image.Exposure`
exposure to display
bbox : `lsst.geom.Box2I`
bounding box of exposure; Used if the exposure is `None`
matches : `list` of `lsst.afw.table.ReferenceMatch`
List of matched objects
frame : `int`
frame number for display
title : `str`
title for display
pause : `bool`
pause for inspection of display? This is done by dropping into pdb.
Notes
-----
- reference objects in refCat are shown as red X
- sources in sourceCat are shown as green +
- distorted sources in sourceCat (position given by distortedCentroidKey)
are shown as green o
- matches are shown as a yellow circle around the source and a yellow line
connecting the reference object and source
- if both exposure and bbox are `None`, no image is displayed